523513369 has 4 divisors (see below), whose sum is σ = 525550644. Its totient is φ = 521476096.

The previous prime is 523513357. The next prime is 523513429. The reversal of 523513369 is 963315325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 468159769 + 55353600 = 21637^2 + 7440^2 .

It is a cyclic number.

It is not a de Polignac number, because 523513369 - 2¹⁹ = 522989081 is a prime.

It is a super-2 number, since 2×523513369² = 548132495043460322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523513349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1018252 + ... + 1018765.

It is an arithmetic number, because the mean of its divisors is an integer number (131387661).

Almost surely, 2^523513369 is an apocalyptic number.

It is an amenable number.

523513369 is a deficient number, since it is larger than the sum of its proper divisors (2037275).

523513369 is a wasteful number, since it uses less digits than its factorization.

523513369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2037274.

The product of its digits is 72900, while the sum is 37.

The square root of 523513369 is about 22880.4145285875. The cubic root of 523513369 is about 805.9521513915.

The spelling of 523513369 in words is "five hundred twenty-three million, five hundred thirteen thousand, three hundred sixty-nine".